ACCRUED ENVIRONMENTAL REMEDIATION COSTS (Accrued Environmental Remediation Costs) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Accrued Environmental Remediation Costs	$ 41,401	$ 50,430
Continuing Operations [Member]
Loss Contingencies [Line Items]
Accrued Environmental Remediation Costs	30,429	39,745
Retained From Former Chemicals Business [Member]
Loss Contingencies [Line Items]
Accrued Environmental Remediation Costs	$ 10,972	$ 10,685